drivers/scsi/fnic/fnic_scsi.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18 #include <linux/mempool.h>
  19 #include <linux/errno.h>
  20 #include <linux/init.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/pci.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/if_ether.h>
  28 #include <linux/if_vlan.h>
  29 #include <linux/delay.h>
  30 #include <linux/gfp.h>
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_host.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_cmnd.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/fc/fc_els.h>
  37 #include <scsi/fc/fc_fcoe.h>
  38 #include <scsi/libfc.h>
  39 #include <scsi/fc_frame.h>
  40 #include "fnic_io.h"
  41 #include "fnic.h"
  42
  43 const char *fnic_state_str[] = {
  44         [FNIC_IN_FC_MODE] =           "FNIC_IN_FC_MODE",
  45         [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
  46         [FNIC_IN_ETH_MODE] =          "FNIC_IN_ETH_MODE",
  47         [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
  48 };
  49
  50 static const char *fnic_ioreq_state_str[] = {
  51         [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
  52         [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
  53         [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
  54         [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
  55         [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
  56 };
  57
  58 static const char *fcpio_status_str[] =  {
  59         [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
  60         [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
  61         [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
  62         [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
  63         [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
  64         [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
  65         [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
  66         [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
  67         [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
  68         [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
  69         [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
  70         [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
  71         [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
  72         [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
  73         [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
  74         [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
  75         [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
  76         [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
  77         [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
  78 };
  79
  80 const char *fnic_state_to_str(unsigned int state)
  81 {
  82         if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
  83                 return "unknown";
  84
  85         return fnic_state_str[state];
  86 }
  87
  88 static const char *fnic_ioreq_state_to_str(unsigned int state)
  89 {
  90         if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
  91             !fnic_ioreq_state_str[state])
  92                 return "unknown";
  93
  94         return fnic_ioreq_state_str[state];
  95 }
  96
  97 static const char *fnic_fcpio_status_to_str(unsigned int status)
  98 {
  99         if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
 100                 return "unknown";
 101
 102         return fcpio_status_str[status];
 103 }
 104
 105 static void fnic_cleanup_io(struct fnic *fnic);
 106
 107 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
 108                                             struct scsi_cmnd *sc)
 109 {
 110         u32 hash = scsi_cmd_to_rq(sc)->tag & (FNIC_IO_LOCKS - 1);
 111
 112         return &fnic->io_req_lock[hash];
 113 }
 114
 115 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
 116                                             int tag)
 117 {
 118         return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
 119 }
 120
 121 /*
 122  * Unmap the data buffer and sense buffer for an io_req,
 123  * also unmap and free the device-private scatter/gather list.
 124  */
 125 static void fnic_release_ioreq_buf(struct fnic *fnic,
 126                                    struct fnic_io_req *io_req,
 127                                    struct scsi_cmnd *sc)
 128 {
 129         if (io_req->sgl_list_pa)
 130                 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
 131                                  sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
 132                                  DMA_TO_DEVICE);
 133         scsi_dma_unmap(sc);
 134
 135         if (io_req->sgl_cnt)
 136                 mempool_free(io_req->sgl_list_alloc,
 137                              fnic->io_sgl_pool[io_req->sgl_type]);
 138         if (io_req->sense_buf_pa)
 139                 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
 140                                  SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
 141 }
 142
 143 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
 144 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
 145 {
 146         /* if no Ack received from firmware, then nothing to clean */
 147         if (!fnic->fw_ack_recd[0])
 148                 return 1;
 149
 150         /*
 151          * Update desc_available count based on number of freed descriptors
 152          * Account for wraparound
 153          */
 154         if (wq->to_clean_index <= fnic->fw_ack_index[0])
 155                 wq->ring.desc_avail += (fnic->fw_ack_index[0]
 156                                         - wq->to_clean_index + 1);
 157         else
 158                 wq->ring.desc_avail += (wq->ring.desc_count
 159                                         - wq->to_clean_index
 160                                         + fnic->fw_ack_index[0] + 1);
 161
 162         /*
 163          * just bump clean index to ack_index+1 accounting for wraparound
 164          * this will essentially free up all descriptors between
 165          * to_clean_index and fw_ack_index, both inclusive
 166          */
 167         wq->to_clean_index =
 168                 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
 169
 170         /* we have processed the acks received so far */
 171         fnic->fw_ack_recd[0] = 0;
 172         return 0;
 173 }
 174
 175
 176 /*
 177  * __fnic_set_state_flags
 178  * Sets/Clears bits in fnic's state_flags
 179  **/
 180 void
 181 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
 182                         unsigned long clearbits)
 183 {
 184         unsigned long flags = 0;
 185         unsigned long host_lock_flags = 0;
 186
 187         spin_lock_irqsave(&fnic->fnic_lock, flags);
 188         spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);
 189
 190         if (clearbits)
 191                 fnic->state_flags &= ~st_flags;
 192         else
 193                 fnic->state_flags |= st_flags;
 194
 195         spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags);
 196         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 197
 198         return;
 199 }
 200
 201
 202 /*
 203  * fnic_fw_reset_handler
 204  * Routine to send reset msg to fw
 205  */
 206 int fnic_fw_reset_handler(struct fnic *fnic)
 207 {
 208         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 209         int ret = 0;
 210         unsigned long flags;
 211
 212         /* indicate fwreset to io path */
 213         fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
 214
 215         skb_queue_purge(&fnic->frame_queue);
 216         skb_queue_purge(&fnic->tx_queue);
 217
 218         /* wait for io cmpl */
 219         while (atomic_read(&fnic->in_flight))
 220                 schedule_timeout(msecs_to_jiffies(1));
 221
 222         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 223
 224         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 225                 free_wq_copy_descs(fnic, wq);
 226
 227         if (!vnic_wq_copy_desc_avail(wq))
 228                 ret = -EAGAIN;
 229         else {
 230                 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
 231                 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
 232                 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
 233                           atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
 234                         atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
 235                                 atomic64_read(
 236                                   &fnic->fnic_stats.fw_stats.active_fw_reqs));
 237         }
 238
 239         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 240
 241         if (!ret) {
 242                 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
 243                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 244                               "Issued fw reset\n");
 245         } else {
 246                 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
 247                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 248                               "Failed to issue fw reset\n");
 249         }
 250
 251         return ret;
 252 }
 253
 254
 255 /*
 256  * fnic_flogi_reg_handler
 257  * Routine to send flogi register msg to fw
 258  */
 259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
 260 {
 261         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 262         enum fcpio_flogi_reg_format_type format;
 263         struct fc_lport *lp = fnic->lport;
 264         u8 gw_mac[ETH_ALEN];
 265         int ret = 0;
 266         unsigned long flags;
 267
 268         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 269
 270         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 271                 free_wq_copy_descs(fnic, wq);
 272
 273         if (!vnic_wq_copy_desc_avail(wq)) {
 274                 ret = -EAGAIN;
 275                 goto flogi_reg_ioreq_end;
 276         }
 277
 278         if (fnic->ctlr.map_dest) {
 279                 eth_broadcast_addr(gw_mac);
 280                 format = FCPIO_FLOGI_REG_DEF_DEST;
 281         } else {
 282                 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
 283                 format = FCPIO_FLOGI_REG_GW_DEST;
 284         }
 285
 286         if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
 287                 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
 288                                                 fc_id, gw_mac,
 289                                                 fnic->data_src_addr,
 290                                                 lp->r_a_tov, lp->e_d_tov);
 291                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 292                               "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
 293                               fc_id, fnic->data_src_addr, gw_mac);
 294         } else {
 295                 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
 296                                                   format, fc_id, gw_mac);
 297                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 298                               "FLOGI reg issued fcid %x map %d dest %pM\n",
 299                               fc_id, fnic->ctlr.map_dest, gw_mac);
 300         }
 301
 302         atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
 303         if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
 304                   atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
 305                 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
 306                   atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
 307
 308 flogi_reg_ioreq_end:
 309         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 310         return ret;
 311 }
 312
 313 /*
 314  * fnic_queue_wq_copy_desc
 315  * Routine to enqueue a wq copy desc
 316  */
 317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 318                                           struct vnic_wq_copy *wq,
 319                                           struct fnic_io_req *io_req,
 320                                           struct scsi_cmnd *sc,
 321                                           int sg_count)
 322 {
 323         struct scatterlist *sg;
 324         struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
 325         struct fc_rport_libfc_priv *rp = rport->dd_data;
 326         struct host_sg_desc *desc;
 327         struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
 328         unsigned int i;
 329         unsigned long intr_flags;
 330         int flags;
 331         u8 exch_flags;
 332         struct scsi_lun fc_lun;
 333
 334         if (sg_count) {
 335                 /* For each SGE, create a device desc entry */
 336                 desc = io_req->sgl_list;
 337                 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
 338                         desc->addr = cpu_to_le64(sg_dma_address(sg));
 339                         desc->len = cpu_to_le32(sg_dma_len(sg));
 340                         desc->_resvd = 0;
 341                         desc++;
 342                 }
 343
 344                 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
 345                                 io_req->sgl_list,
 346                                 sizeof(io_req->sgl_list[0]) * sg_count,
 347                                 DMA_TO_DEVICE);
 348                 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {
 349                         printk(KERN_ERR "DMA mapping failed\n");
 350                         return SCSI_MLQUEUE_HOST_BUSY;
 351                 }
 352         }
 353
 354         io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
 355                                               sc->sense_buffer,
 356                                               SCSI_SENSE_BUFFERSIZE,
 357                                               DMA_FROM_DEVICE);
 358         if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {
 359                 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
 360                                 sizeof(io_req->sgl_list[0]) * sg_count,
 361                                 DMA_TO_DEVICE);
 362                 printk(KERN_ERR "DMA mapping failed\n");
 363                 return SCSI_MLQUEUE_HOST_BUSY;
 364         }
 365
 366         int_to_scsilun(sc->device->lun, &fc_lun);
 367
 368         /* Enqueue the descriptor in the Copy WQ */
 369         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
 370
 371         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 372                 free_wq_copy_descs(fnic, wq);
 373
 374         if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
 375                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 376                 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
 377                           "fnic_queue_wq_copy_desc failure - no descriptors\n");
 378                 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
 379                 return SCSI_MLQUEUE_HOST_BUSY;
 380         }
 381
 382         flags = 0;
 383         if (sc->sc_data_direction == DMA_FROM_DEVICE)
 384                 flags = FCPIO_ICMND_RDDATA;
 385         else if (sc->sc_data_direction == DMA_TO_DEVICE)
 386                 flags = FCPIO_ICMND_WRDATA;
 387
 388         exch_flags = 0;
 389         if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
 390             (rp->flags & FC_RP_FLAGS_RETRY))
 391                 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
 392
 393         fnic_queue_wq_copy_desc_icmnd_16(wq, scsi_cmd_to_rq(sc)->tag,
 394                                          0, exch_flags, io_req->sgl_cnt,
 395                                          SCSI_SENSE_BUFFERSIZE,
 396                                          io_req->sgl_list_pa,
 397                                          io_req->sense_buf_pa,
 398                                          0, /* scsi cmd ref, always 0 */
 399                                          FCPIO_ICMND_PTA_SIMPLE,
 400                                                 /* scsi pri and tag */
 401                                          flags, /* command flags */
 402                                          sc->cmnd, sc->cmd_len,
 403                                          scsi_bufflen(sc),
 404                                          fc_lun.scsi_lun, io_req->port_id,
 405                                          rport->maxframe_size, rp->r_a_tov,
 406                                          rp->e_d_tov);
 407
 408         atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
 409         if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
 410                   atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
 411                 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
 412                   atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
 413
 414         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 415         return 0;
 416 }
 417
 418 /*
 419  * fnic_queuecommand
 420  * Routine to send a scsi cdb
 421  * Called with host_lock held and interrupts disabled.
 422  */
 423 static int fnic_queuecommand_lck(struct scsi_cmnd *sc)
 424 {
 425         void (*done)(struct scsi_cmnd *) = scsi_done;
 426         const int tag = scsi_cmd_to_rq(sc)->tag;
 427         struct fc_lport *lp = shost_priv(sc->device->host);
 428         struct fc_rport *rport;
 429         struct fnic_io_req *io_req = NULL;
 430         struct fnic *fnic = lport_priv(lp);
 431         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 432         struct vnic_wq_copy *wq;
 433         int ret;
 434         u64 cmd_trace;
 435         int sg_count = 0;
 436         unsigned long flags = 0;
 437         unsigned long ptr;
 438         spinlock_t *io_lock = NULL;
 439         int io_lock_acquired = 0;
 440         struct fc_rport_libfc_priv *rp;
 441
 442         if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
 443                 return SCSI_MLQUEUE_HOST_BUSY;
 444
 445         if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET)))
 446                 return SCSI_MLQUEUE_HOST_BUSY;
 447
 448         rport = starget_to_rport(scsi_target(sc->device));
 449         if (!rport) {
 450                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 451                                 "returning DID_NO_CONNECT for IO as rport is NULL\n");
 452                 sc->result = DID_NO_CONNECT << 16;
 453                 done(sc);
 454                 return 0;
 455         }
 456
 457         ret = fc_remote_port_chkready(rport);
 458         if (ret) {
 459                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 460                                 "rport is not ready\n");
 461                 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
 462                 sc->result = ret;
 463                 done(sc);
 464                 return 0;
 465         }
 466
 467         rp = rport->dd_data;
 468         if (!rp || rp->rp_state == RPORT_ST_DELETE) {
 469                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 470                         "rport 0x%x removed, returning DID_NO_CONNECT\n",
 471                         rport->port_id);
 472
 473                 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
 474                 sc->result = DID_NO_CONNECT<<16;
 475                 done(sc);
 476                 return 0;
 477         }
 478
 479         if (rp->rp_state != RPORT_ST_READY) {
 480                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 481                         "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
 482                         rport->port_id, rp->rp_state);
 483
 484                 sc->result = DID_IMM_RETRY << 16;
 485                 done(sc);
 486                 return 0;
 487         }
 488
 489         if (lp->state != LPORT_ST_READY || !(lp->link_up))
 490                 return SCSI_MLQUEUE_HOST_BUSY;
 491
 492         atomic_inc(&fnic->in_flight);
 493
 494         /*
 495          * Release host lock, use driver resource specific locks from here.
 496          * Don't re-enable interrupts in case they were disabled prior to the
 497          * caller disabling them.
 498          */
 499         spin_unlock(lp->host->host_lock);
 500         CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
 501         CMD_FLAGS(sc) = FNIC_NO_FLAGS;
 502
 503         /* Get a new io_req for this SCSI IO */
 504         io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
 505         if (!io_req) {
 506                 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
 507                 ret = SCSI_MLQUEUE_HOST_BUSY;
 508                 goto out;
 509         }
 510         memset(io_req, 0, sizeof(*io_req));
 511
 512         /* Map the data buffer */
 513         sg_count = scsi_dma_map(sc);
 514         if (sg_count < 0) {
 515                 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
 516                           tag, sc, 0, sc->cmnd[0], sg_count, CMD_STATE(sc));
 517                 mempool_free(io_req, fnic->io_req_pool);
 518                 goto out;
 519         }
 520
 521         /* Determine the type of scatter/gather list we need */
 522         io_req->sgl_cnt = sg_count;
 523         io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
 524         if (sg_count > FNIC_DFLT_SG_DESC_CNT)
 525                 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
 526
 527         if (sg_count) {
 528                 io_req->sgl_list =
 529                         mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
 530                                       GFP_ATOMIC);
 531                 if (!io_req->sgl_list) {
 532                         atomic64_inc(&fnic_stats->io_stats.alloc_failures);
 533                         ret = SCSI_MLQUEUE_HOST_BUSY;
 534                         scsi_dma_unmap(sc);
 535                         mempool_free(io_req, fnic->io_req_pool);
 536                         goto out;
 537                 }
 538
 539                 /* Cache sgl list allocated address before alignment */
 540                 io_req->sgl_list_alloc = io_req->sgl_list;
 541                 ptr = (unsigned long) io_req->sgl_list;
 542                 if (ptr % FNIC_SG_DESC_ALIGN) {
 543                         io_req->sgl_list = (struct host_sg_desc *)
 544                                 (((unsigned long) ptr
 545                                   + FNIC_SG_DESC_ALIGN - 1)
 546                                  & ~(FNIC_SG_DESC_ALIGN - 1));
 547                 }
 548         }
 549
 550         /*
 551         * Will acquire lock defore setting to IO initialized.
 552         */
 553
 554         io_lock = fnic_io_lock_hash(fnic, sc);
 555         spin_lock_irqsave(io_lock, flags);
 556
 557         /* initialize rest of io_req */
 558         io_lock_acquired = 1;
 559         io_req->port_id = rport->port_id;
 560         io_req->start_time = jiffies;
 561         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
 562         CMD_SP(sc) = (char *)io_req;
 563         CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
 564
 565         /* create copy wq desc and enqueue it */
 566         wq = &fnic->wq_copy[0];
 567         ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
 568         if (ret) {
 569                 /*
 570                  * In case another thread cancelled the request,
 571                  * refetch the pointer under the lock.
 572                  */
 573                 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
 574                           tag, sc, 0, 0, 0,
 575                           (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
 576                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 577                 CMD_SP(sc) = NULL;
 578                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 579                 spin_unlock_irqrestore(io_lock, flags);
 580                 if (io_req) {
 581                         fnic_release_ioreq_buf(fnic, io_req, sc);
 582                         mempool_free(io_req, fnic->io_req_pool);
 583                 }
 584                 atomic_dec(&fnic->in_flight);
 585                 /* acquire host lock before returning to SCSI */
 586                 spin_lock(lp->host->host_lock);
 587                 return ret;
 588         } else {
 589                 atomic64_inc(&fnic_stats->io_stats.active_ios);
 590                 atomic64_inc(&fnic_stats->io_stats.num_ios);
 591                 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
 592                           atomic64_read(&fnic_stats->io_stats.max_active_ios))
 593                         atomic64_set(&fnic_stats->io_stats.max_active_ios,
 594                              atomic64_read(&fnic_stats->io_stats.active_ios));
 595
 596                 /* REVISIT: Use per IO lock in the final code */
 597                 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
 598         }
 599 out:
 600         cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
 601                         (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
 602                         (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
 603                         sc->cmnd[5]);
 604
 605         FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
 606                   tag, sc, io_req, sg_count, cmd_trace,
 607                   (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
 608
 609         /* if only we issued IO, will we have the io lock */
 610         if (io_lock_acquired)
 611                 spin_unlock_irqrestore(io_lock, flags);
 612
 613         atomic_dec(&fnic->in_flight);
 614         /* acquire host lock before returning to SCSI */
 615         spin_lock(lp->host->host_lock);
 616         return ret;
 617 }
 618
 619 DEF_SCSI_QCMD(fnic_queuecommand)
 620
 621 /*
 622  * fnic_fcpio_fw_reset_cmpl_handler
 623  * Routine to handle fw reset completion
 624  */
 625 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 626                                             struct fcpio_fw_req *desc)
 627 {
 628         u8 type;
 629         u8 hdr_status;
 630         struct fcpio_tag tag;
 631         int ret = 0;
 632         unsigned long flags;
 633         struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
 634
 635         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 636
 637         atomic64_inc(&reset_stats->fw_reset_completions);
 638
 639         /* Clean up all outstanding io requests */
 640         fnic_cleanup_io(fnic);
 641
 642         atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
 643         atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
 644         atomic64_set(&fnic->io_cmpl_skip, 0);
 645
 646         spin_lock_irqsave(&fnic->fnic_lock, flags);
 647
 648         /* fnic should be in FC_TRANS_ETH_MODE */
 649         if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
 650                 /* Check status of reset completion */
 651                 if (!hdr_status) {
 652                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 653                                       "reset cmpl success\n");
 654                         /* Ready to send flogi out */
 655                         fnic->state = FNIC_IN_ETH_MODE;
 656                 } else {
 657                         FNIC_SCSI_DBG(KERN_DEBUG,
 658                                       fnic->lport->host,
 659                                       "fnic fw_reset : failed %s\n",
 660                                       fnic_fcpio_status_to_str(hdr_status));
 661
 662                         /*
 663                          * Unable to change to eth mode, cannot send out flogi
 664                          * Change state to fc mode, so that subsequent Flogi
 665                          * requests from libFC will cause more attempts to
 666                          * reset the firmware. Free the cached flogi
 667                          */
 668                         fnic->state = FNIC_IN_FC_MODE;
 669                         atomic64_inc(&reset_stats->fw_reset_failures);
 670                         ret = -1;
 671                 }
 672         } else {
 673                 FNIC_SCSI_DBG(KERN_DEBUG,
 674                               fnic->lport->host,
 675                               "Unexpected state %s while processing"
 676                               " reset cmpl\n", fnic_state_to_str(fnic->state));
 677                 atomic64_inc(&reset_stats->fw_reset_failures);
 678                 ret = -1;
 679         }
 680
 681         /* Thread removing device blocks till firmware reset is complete */
 682         if (fnic->remove_wait)
 683                 complete(fnic->remove_wait);
 684
 685         /*
 686          * If fnic is being removed, or fw reset failed
 687          * free the flogi frame. Else, send it out
 688          */
 689         if (fnic->remove_wait || ret) {
 690                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 691                 skb_queue_purge(&fnic->tx_queue);
 692                 goto reset_cmpl_handler_end;
 693         }
 694
 695         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 696
 697         fnic_flush_tx(fnic);
 698
 699  reset_cmpl_handler_end:
 700         fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
 701
 702         return ret;
 703 }
 704
 705 /*
 706  * fnic_fcpio_flogi_reg_cmpl_handler
 707  * Routine to handle flogi register completion
 708  */
 709 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
 710                                              struct fcpio_fw_req *desc)
 711 {
 712         u8 type;
 713         u8 hdr_status;
 714         struct fcpio_tag tag;
 715         int ret = 0;
 716         unsigned long flags;
 717
 718         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 719
 720         /* Update fnic state based on status of flogi reg completion */
 721         spin_lock_irqsave(&fnic->fnic_lock, flags);
 722
 723         if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
 724
 725                 /* Check flogi registration completion status */
 726                 if (!hdr_status) {
 727                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 728                                       "flog reg succeeded\n");
 729                         fnic->state = FNIC_IN_FC_MODE;
 730                 } else {
 731                         FNIC_SCSI_DBG(KERN_DEBUG,
 732                                       fnic->lport->host,
 733                                       "fnic flogi reg :failed %s\n",
 734                                       fnic_fcpio_status_to_str(hdr_status));
 735                         fnic->state = FNIC_IN_ETH_MODE;
 736                         ret = -1;
 737                 }
 738         } else {
 739                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 740                               "Unexpected fnic state %s while"
 741                               " processing flogi reg completion\n",
 742                               fnic_state_to_str(fnic->state));
 743                 ret = -1;
 744         }
 745
 746         if (!ret) {
 747                 if (fnic->stop_rx_link_events) {
 748                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 749                         goto reg_cmpl_handler_end;
 750                 }
 751                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 752
 753                 fnic_flush_tx(fnic);
 754                 queue_work(fnic_event_queue, &fnic->frame_work);
 755         } else {
 756                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 757         }
 758
 759 reg_cmpl_handler_end:
 760         return ret;
 761 }
 762
 763 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
 764                                         u16 request_out)
 765 {
 766         if (wq->to_clean_index <= wq->to_use_index) {
 767                 /* out of range, stale request_out index */
 768                 if (request_out < wq->to_clean_index ||
 769                     request_out >= wq->to_use_index)
 770                         return 0;
 771         } else {
 772                 /* out of range, stale request_out index */
 773                 if (request_out < wq->to_clean_index &&
 774                     request_out >= wq->to_use_index)
 775                         return 0;
 776         }
 777         /* request_out index is in range */
 778         return 1;
 779 }
 780
 781
 782 /*
 783  * Mark that ack received and store the Ack index. If there are multiple
 784  * acks received before Tx thread cleans it up, the latest value will be
 785  * used which is correct behavior. This state should be in the copy Wq
 786  * instead of in the fnic
 787  */
 788 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
 789                                           unsigned int cq_index,
 790                                           struct fcpio_fw_req *desc)
 791 {
 792         struct vnic_wq_copy *wq;
 793         u16 request_out = desc->u.ack.request_out;
 794         unsigned long flags;
 795         u64 *ox_id_tag = (u64 *)(void *)desc;
 796
 797         /* mark the ack state */
 798         wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
 799         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 800
 801         fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
 802         if (is_ack_index_in_range(wq, request_out)) {
 803                 fnic->fw_ack_index[0] = request_out;
 804                 fnic->fw_ack_recd[0] = 1;
 805         } else
 806                 atomic64_inc(
 807                         &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
 808
 809         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 810         FNIC_TRACE(fnic_fcpio_ack_handler,
 811                   fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
 812                   ox_id_tag[4], ox_id_tag[5]);
 813 }
 814
 815 /*
 816  * fnic_fcpio_icmnd_cmpl_handler
 817  * Routine to handle icmnd completions
 818  */
 819 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
 820                                          struct fcpio_fw_req *desc)
 821 {
 822         u8 type;
 823         u8 hdr_status;
 824         struct fcpio_tag tag;
 825         u32 id;
 826         u64 xfer_len = 0;
 827         struct fcpio_icmnd_cmpl *icmnd_cmpl;
 828         struct fnic_io_req *io_req;
 829         struct scsi_cmnd *sc;
 830         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 831         unsigned long flags;
 832         spinlock_t *io_lock;
 833         u64 cmd_trace;
 834         unsigned long start_time;
 835         unsigned long io_duration_time;
 836
 837         /* Decode the cmpl description to get the io_req id */
 838         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 839         fcpio_tag_id_dec(&tag, &id);
 840         icmnd_cmpl = &desc->u.icmnd_cmpl;
 841
 842         if (id >= fnic->fnic_max_tag_id) {
 843                 shost_printk(KERN_ERR, fnic->lport->host,
 844                         "Tag out of range tag %x hdr status = %s\n",
 845                              id, fnic_fcpio_status_to_str(hdr_status));
 846                 return;
 847         }
 848
 849         sc = scsi_host_find_tag(fnic->lport->host, id);
 850         WARN_ON_ONCE(!sc);
 851         if (!sc) {
 852                 atomic64_inc(&fnic_stats->io_stats.sc_null);
 853                 shost_printk(KERN_ERR, fnic->lport->host,
 854                           "icmnd_cmpl sc is null - "
 855                           "hdr status = %s tag = 0x%x desc = 0x%p\n",
 856                           fnic_fcpio_status_to_str(hdr_status), id, desc);
 857                 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
 858                           fnic->lport->host->host_no, id,
 859                           ((u64)icmnd_cmpl->_resvd0[1] << 16 |
 860                           (u64)icmnd_cmpl->_resvd0[0]),
 861                           ((u64)hdr_status << 16 |
 862                           (u64)icmnd_cmpl->scsi_status << 8 |
 863                           (u64)icmnd_cmpl->flags), desc,
 864                           (u64)icmnd_cmpl->residual, 0);
 865                 return;
 866         }
 867
 868         io_lock = fnic_io_lock_hash(fnic, sc);
 869         spin_lock_irqsave(io_lock, flags);
 870         io_req = (struct fnic_io_req *)CMD_SP(sc);
 871         WARN_ON_ONCE(!io_req);
 872         if (!io_req) {
 873                 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
 874                 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
 875                 spin_unlock_irqrestore(io_lock, flags);
 876                 shost_printk(KERN_ERR, fnic->lport->host,
 877                           "icmnd_cmpl io_req is null - "
 878                           "hdr status = %s tag = 0x%x sc 0x%p\n",
 879                           fnic_fcpio_status_to_str(hdr_status), id, sc);
 880                 return;
 881         }
 882         start_time = io_req->start_time;
 883
 884         /* firmware completed the io */
 885         io_req->io_completed = 1;
 886
 887         /*
 888          *  if SCSI-ML has already issued abort on this command,
 889          *  set completion of the IO. The abts path will clean it up
 890          */
 891         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
 892
 893                 /*
 894                  * set the FNIC_IO_DONE so that this doesn't get
 895                  * flagged as 'out of order' if it was not aborted
 896                  */
 897                 CMD_FLAGS(sc) |= FNIC_IO_DONE;
 898                 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
 899                 spin_unlock_irqrestore(io_lock, flags);
 900                 if(FCPIO_ABORTED == hdr_status)
 901                         CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
 902
 903                 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
 904                         "icmnd_cmpl abts pending "
 905                           "hdr status = %s tag = 0x%x sc = 0x%p "
 906                           "scsi_status = %x residual = %d\n",
 907                           fnic_fcpio_status_to_str(hdr_status),
 908                           id, sc,
 909                           icmnd_cmpl->scsi_status,
 910                           icmnd_cmpl->residual);
 911                 return;
 912         }
 913
 914         /* Mark the IO as complete */
 915         CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 916
 917         icmnd_cmpl = &desc->u.icmnd_cmpl;
 918
 919         switch (hdr_status) {
 920         case FCPIO_SUCCESS:
 921                 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
 922                 xfer_len = scsi_bufflen(sc);
 923
 924                 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) {
 925                         xfer_len -= icmnd_cmpl->residual;
 926                         scsi_set_resid(sc, icmnd_cmpl->residual);
 927                 }
 928
 929                 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
 930                         atomic64_inc(&fnic_stats->misc_stats.check_condition);
 931
 932                 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
 933                         atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
 934                 break;
 935
 936         case FCPIO_TIMEOUT:          /* request was timed out */
 937                 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
 938                 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
 939                 break;
 940
 941         case FCPIO_ABORTED:          /* request was aborted */
 942                 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
 943                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 944                 break;
 945
 946         case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
 947                 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
 948                 scsi_set_resid(sc, icmnd_cmpl->residual);
 949                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 950                 break;
 951
 952         case FCPIO_OUT_OF_RESOURCE:  /* out of resources to complete request */
 953                 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
 954                 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
 955                 break;
 956
 957         case FCPIO_IO_NOT_FOUND:     /* requested I/O was not found */
 958                 atomic64_inc(&fnic_stats->io_stats.io_not_found);
 959                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 960                 break;
 961
 962         case FCPIO_SGL_INVALID:      /* request was aborted due to sgl error */
 963                 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
 964                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 965                 break;
 966
 967         case FCPIO_FW_ERR:           /* request was terminated due fw error */
 968                 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
 969                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 970                 break;
 971
 972         case FCPIO_MSS_INVALID:      /* request was aborted due to mss error */
 973                 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
 974                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 975                 break;
 976
 977         case FCPIO_INVALID_HEADER:   /* header contains invalid data */
 978         case FCPIO_INVALID_PARAM:    /* some parameter in request invalid */
 979         case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
 980         default:
 981                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 982                 break;
 983         }
 984
 985         /* Break link with the SCSI command */
 986         CMD_SP(sc) = NULL;
 987         CMD_FLAGS(sc) |= FNIC_IO_DONE;
 988
 989         spin_unlock_irqrestore(io_lock, flags);
 990
 991         if (hdr_status != FCPIO_SUCCESS) {
 992                 atomic64_inc(&fnic_stats->io_stats.io_failures);
 993                 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
 994                              fnic_fcpio_status_to_str(hdr_status));
 995         }
 996
 997         fnic_release_ioreq_buf(fnic, io_req, sc);
 998
 999         mempool_free(io_req, fnic->io_req_pool);
1000
1001         cmd_trace = ((u64)hdr_status << 56) |
1002                   (u64)icmnd_cmpl->scsi_status << 48 |
1003                   (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
1004                   (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1005                   (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
1006
1007         FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
1008                   sc->device->host->host_no, id, sc,
1009                   ((u64)icmnd_cmpl->_resvd0[1] << 56 |
1010                   (u64)icmnd_cmpl->_resvd0[0] << 48 |
1011                   jiffies_to_msecs(jiffies - start_time)),
1012                   desc, cmd_trace,
1013                   (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1014
1015         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1016                 fnic->lport->host_stats.fcp_input_requests++;
1017                 fnic->fcp_input_bytes += xfer_len;
1018         } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1019                 fnic->lport->host_stats.fcp_output_requests++;
1020                 fnic->fcp_output_bytes += xfer_len;
1021         } else
1022                 fnic->lport->host_stats.fcp_control_requests++;
1023
1024         atomic64_dec(&fnic_stats->io_stats.active_ios);
1025         if (atomic64_read(&fnic->io_cmpl_skip))
1026                 atomic64_dec(&fnic->io_cmpl_skip);
1027         else
1028                 atomic64_inc(&fnic_stats->io_stats.io_completions);
1029
1030
1031         io_duration_time = jiffies_to_msecs(jiffies) -
1032                                                 jiffies_to_msecs(start_time);
1033
1034         if(io_duration_time <= 10)
1035                 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
1036         else if(io_duration_time <= 100)
1037                 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
1038         else if(io_duration_time <= 500)
1039                 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
1040         else if(io_duration_time <= 5000)
1041                 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
1042         else if(io_duration_time <= 10000)
1043                 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
1044         else if(io_duration_time <= 30000)
1045                 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
1046         else {
1047                 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
1048
1049                 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
1050                         atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
1051         }
1052
1053         /* Call SCSI completion function to complete the IO */
1054         scsi_done(sc);
1055 }
1056
1057 /* fnic_fcpio_itmf_cmpl_handler
1058  * Routine to handle itmf completions
1059  */
1060 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1061                                         struct fcpio_fw_req *desc)
1062 {
1063         u8 type;
1064         u8 hdr_status;
1065         struct fcpio_tag tag;
1066         u32 id;
1067         struct scsi_cmnd *sc;
1068         struct fnic_io_req *io_req;
1069         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1070         struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1071         struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1072         struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1073         unsigned long flags;
1074         spinlock_t *io_lock;
1075         unsigned long start_time;
1076
1077         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1078         fcpio_tag_id_dec(&tag, &id);
1079
1080         if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1081                 shost_printk(KERN_ERR, fnic->lport->host,
1082                 "Tag out of range tag %x hdr status = %s\n",
1083                 id, fnic_fcpio_status_to_str(hdr_status));
1084                 return;
1085         }
1086
1087         sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1088         WARN_ON_ONCE(!sc);
1089         if (!sc) {
1090                 atomic64_inc(&fnic_stats->io_stats.sc_null);
1091                 shost_printk(KERN_ERR, fnic->lport->host,
1092                           "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1093                           fnic_fcpio_status_to_str(hdr_status), id);
1094                 return;
1095         }
1096         io_lock = fnic_io_lock_hash(fnic, sc);
1097         spin_lock_irqsave(io_lock, flags);
1098         io_req = (struct fnic_io_req *)CMD_SP(sc);
1099         WARN_ON_ONCE(!io_req);
1100         if (!io_req) {
1101                 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1102                 spin_unlock_irqrestore(io_lock, flags);
1103                 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1104                 shost_printk(KERN_ERR, fnic->lport->host,
1105                           "itmf_cmpl io_req is null - "
1106                           "hdr status = %s tag = 0x%x sc 0x%p\n",
1107                           fnic_fcpio_status_to_str(hdr_status), id, sc);
1108                 return;
1109         }
1110         start_time = io_req->start_time;
1111
1112         if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1113                 /* Abort and terminate completion of device reset req */
1114                 /* REVISIT : Add asserts about various flags */
1115                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1116                               "dev reset abts cmpl recd. id %x status %s\n",
1117                               id, fnic_fcpio_status_to_str(hdr_status));
1118                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1119                 CMD_ABTS_STATUS(sc) = hdr_status;
1120                 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1121                 if (io_req->abts_done)
1122                         complete(io_req->abts_done);
1123                 spin_unlock_irqrestore(io_lock, flags);
1124         } else if (id & FNIC_TAG_ABORT) {
1125                 /* Completion of abort cmd */
1126                 switch (hdr_status) {
1127                 case FCPIO_SUCCESS:
1128                         break;
1129                 case FCPIO_TIMEOUT:
1130                         if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1131                                 atomic64_inc(&abts_stats->abort_fw_timeouts);
1132                         else
1133                                 atomic64_inc(
1134                                         &term_stats->terminate_fw_timeouts);
1135                         break;
1136                 case FCPIO_ITMF_REJECTED:
1137                         FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1138                                 "abort reject recd. id %d\n",
1139                                 (int)(id & FNIC_TAG_MASK));
1140                         break;
1141                 case FCPIO_IO_NOT_FOUND:
1142                         if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1143                                 atomic64_inc(&abts_stats->abort_io_not_found);
1144                         else
1145                                 atomic64_inc(
1146                                         &term_stats->terminate_io_not_found);
1147                         break;
1148                 default:
1149                         if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1150                                 atomic64_inc(&abts_stats->abort_failures);
1151                         else
1152                                 atomic64_inc(
1153                                         &term_stats->terminate_failures);
1154                         break;
1155                 }
1156                 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1157                         /* This is a late completion. Ignore it */
1158                         spin_unlock_irqrestore(io_lock, flags);
1159                         return;
1160                 }
1161
1162                 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1163                 CMD_ABTS_STATUS(sc) = hdr_status;
1164
1165                 /* If the status is IO not found consider it as success */
1166                 if (hdr_status == FCPIO_IO_NOT_FOUND)
1167                         CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
1168
1169                 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1170                         atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1171
1172                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1173                               "abts cmpl recd. id %d status %s\n",
1174                               (int)(id & FNIC_TAG_MASK),
1175                               fnic_fcpio_status_to_str(hdr_status));
1176
1177                 /*
1178                  * If scsi_eh thread is blocked waiting for abts to complete,
1179                  * signal completion to it. IO will be cleaned in the thread
1180                  * else clean it in this context
1181                  */
1182                 if (io_req->abts_done) {
1183                         complete(io_req->abts_done);
1184                         spin_unlock_irqrestore(io_lock, flags);
1185                 } else {
1186                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1187                                       "abts cmpl, completing IO\n");
1188                         CMD_SP(sc) = NULL;
1189                         sc->result = (DID_ERROR << 16);
1190
1191                         spin_unlock_irqrestore(io_lock, flags);
1192
1193                         fnic_release_ioreq_buf(fnic, io_req, sc);
1194                         mempool_free(io_req, fnic->io_req_pool);
1195                         FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1196                                    sc->device->host->host_no, id,
1197                                    sc,
1198                                    jiffies_to_msecs(jiffies - start_time),
1199                                    desc,
1200                                    (((u64)hdr_status << 40) |
1201                                     (u64)sc->cmnd[0] << 32 |
1202                                     (u64)sc->cmnd[2] << 24 |
1203                                     (u64)sc->cmnd[3] << 16 |
1204                                     (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1205                                    (((u64)CMD_FLAGS(sc) << 32) |
1206                                     CMD_STATE(sc)));
1207                         scsi_done(sc);
1208                         atomic64_dec(&fnic_stats->io_stats.active_ios);
1209                         if (atomic64_read(&fnic->io_cmpl_skip))
1210                                 atomic64_dec(&fnic->io_cmpl_skip);
1211                         else
1212                                 atomic64_inc(&fnic_stats->io_stats.io_completions);
1213                 }
1214         } else if (id & FNIC_TAG_DEV_RST) {
1215                 /* Completion of device reset */
1216                 CMD_LR_STATUS(sc) = hdr_status;
1217                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1218                         spin_unlock_irqrestore(io_lock, flags);
1219                         CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1220                         FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1221                                   sc->device->host->host_no, id, sc,
1222                                   jiffies_to_msecs(jiffies - start_time),
1223                                   desc, 0,
1224                                   (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1225                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1226                                 "Terminate pending "
1227                                 "dev reset cmpl recd. id %d status %s\n",
1228                                 (int)(id & FNIC_TAG_MASK),
1229                                 fnic_fcpio_status_to_str(hdr_status));
1230                         return;
1231                 }
1232                 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1233                         /* Need to wait for terminate completion */
1234                         spin_unlock_irqrestore(io_lock, flags);
1235                         FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1236                                   sc->device->host->host_no, id, sc,
1237                                   jiffies_to_msecs(jiffies - start_time),
1238                                   desc, 0,
1239                                   (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1240                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1241                                 "dev reset cmpl recd after time out. "
1242                                 "id %d status %s\n",
1243                                 (int)(id & FNIC_TAG_MASK),
1244                                 fnic_fcpio_status_to_str(hdr_status));
1245                         return;
1246                 }
1247                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1248                 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1249                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1250                               "dev reset cmpl recd. id %d status %s\n",
1251                               (int)(id & FNIC_TAG_MASK),
1252                               fnic_fcpio_status_to_str(hdr_status));
1253                 if (io_req->dr_done)
1254                         complete(io_req->dr_done);
1255                 spin_unlock_irqrestore(io_lock, flags);
1256
1257         } else {
1258                 shost_printk(KERN_ERR, fnic->lport->host,
1259                              "Unexpected itmf io state %s tag %x\n",
1260                              fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1261                 spin_unlock_irqrestore(io_lock, flags);
1262         }
1263
1264 }
1265
1266 /*
1267  * fnic_fcpio_cmpl_handler
1268  * Routine to service the cq for wq_copy
1269  */
1270 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1271                                    unsigned int cq_index,
1272                                    struct fcpio_fw_req *desc)
1273 {
1274         struct fnic *fnic = vnic_dev_priv(vdev);
1275
1276         switch (desc->hdr.type) {
1277         case FCPIO_ICMND_CMPL: /* fw completed a command */
1278         case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1279         case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1280         case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1281         case FCPIO_RESET_CMPL: /* fw completed reset */
1282                 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1283                 break;
1284         default:
1285                 break;
1286         }
1287
1288         switch (desc->hdr.type) {
1289         case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1290                 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1291                 break;
1292
1293         case FCPIO_ICMND_CMPL: /* fw completed a command */
1294                 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1295                 break;
1296
1297         case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1298                 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1299                 break;
1300
1301         case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1302         case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1303                 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1304                 break;
1305
1306         case FCPIO_RESET_CMPL: /* fw completed reset */
1307                 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1308                 break;
1309
1310         default:
1311                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1312                               "firmware completion type %d\n",
1313                               desc->hdr.type);
1314                 break;
1315         }
1316
1317         return 0;
1318 }
1319
1320 /*
1321  * fnic_wq_copy_cmpl_handler
1322  * Routine to process wq copy
1323  */
1324 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1325 {
1326         unsigned int wq_work_done = 0;
1327         unsigned int i, cq_index;
1328         unsigned int cur_work_done;
1329         struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1330         u64 start_jiffies = 0;
1331         u64 end_jiffies = 0;
1332         u64 delta_jiffies = 0;
1333         u64 delta_ms = 0;
1334
1335         for (i = 0; i < fnic->wq_copy_count; i++) {
1336                 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1337
1338                 start_jiffies = jiffies;
1339                 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1340                                                      fnic_fcpio_cmpl_handler,
1341                                                      copy_work_to_do);
1342                 end_jiffies = jiffies;
1343
1344                 wq_work_done += cur_work_done;
1345                 delta_jiffies = end_jiffies - start_jiffies;
1346                 if (delta_jiffies >
1347                         (u64) atomic64_read(&misc_stats->max_isr_jiffies)) {
1348                         atomic64_set(&misc_stats->max_isr_jiffies,
1349                                         delta_jiffies);
1350                         delta_ms = jiffies_to_msecs(delta_jiffies);
1351                         atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);
1352                         atomic64_set(&misc_stats->corr_work_done,
1353                                         cur_work_done);
1354                 }
1355         }
1356         return wq_work_done;
1357 }
1358
1359 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data,
1360                                  bool reserved)
1361 {
1362         const int tag = scsi_cmd_to_rq(sc)->tag;
1363         struct fnic *fnic = data;
1364         struct fnic_io_req *io_req;
1365         unsigned long flags = 0;
1366         spinlock_t *io_lock;
1367         unsigned long start_time = 0;
1368         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1369
1370         io_lock = fnic_io_lock_tag(fnic, tag);
1371         spin_lock_irqsave(io_lock, flags);
1372
1373         io_req = (struct fnic_io_req *)CMD_SP(sc);
1374         if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1375             !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1376                 /*
1377                  * We will be here only when FW completes reset
1378                  * without sending completions for outstanding ios.
1379                  */
1380                 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1381                 if (io_req && io_req->dr_done)
1382                         complete(io_req->dr_done);
1383                 else if (io_req && io_req->abts_done)
1384                         complete(io_req->abts_done);
1385                 spin_unlock_irqrestore(io_lock, flags);
1386                 return true;
1387         } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1388                 spin_unlock_irqrestore(io_lock, flags);
1389                 return true;
1390         }
1391         if (!io_req) {
1392                 spin_unlock_irqrestore(io_lock, flags);
1393                 goto cleanup_scsi_cmd;
1394         }
1395
1396         CMD_SP(sc) = NULL;
1397
1398         spin_unlock_irqrestore(io_lock, flags);
1399
1400         /*
1401          * If there is a scsi_cmnd associated with this io_req, then
1402          * free the corresponding state
1403          */
1404         start_time = io_req->start_time;
1405         fnic_release_ioreq_buf(fnic, io_req, sc);
1406         mempool_free(io_req, fnic->io_req_pool);
1407
1408 cleanup_scsi_cmd:
1409         sc->result = DID_TRANSPORT_DISRUPTED << 16;
1410         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1411                       "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
1412                       tag, sc, jiffies - start_time);
1413
1414         if (atomic64_read(&fnic->io_cmpl_skip))
1415                 atomic64_dec(&fnic->io_cmpl_skip);
1416         else
1417                 atomic64_inc(&fnic_stats->io_stats.io_completions);
1418
1419         /* Complete the command to SCSI */
1420         if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED))
1421                 shost_printk(KERN_ERR, fnic->lport->host,
1422                              "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
1423                              tag, sc);
1424
1425         FNIC_TRACE(fnic_cleanup_io,
1426                    sc->device->host->host_no, tag, sc,
1427                    jiffies_to_msecs(jiffies - start_time),
1428                    0, ((u64)sc->cmnd[0] << 32 |
1429                        (u64)sc->cmnd[2] << 24 |
1430                        (u64)sc->cmnd[3] << 16 |
1431                        (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1432                    (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1433
1434         scsi_done(sc);
1435
1436         return true;
1437 }
1438
1439 static void fnic_cleanup_io(struct fnic *fnic)
1440 {
1441         scsi_host_busy_iter(fnic->lport->host,
1442                             fnic_cleanup_io_iter, fnic);
1443 }
1444
1445 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1446                                   struct fcpio_host_req *desc)
1447 {
1448         u32 id;
1449         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1450         struct fnic_io_req *io_req;
1451         struct scsi_cmnd *sc;
1452         unsigned long flags;
1453         spinlock_t *io_lock;
1454         unsigned long start_time = 0;
1455
1456         /* get the tag reference */
1457         fcpio_tag_id_dec(&desc->hdr.tag, &id);
1458         id &= FNIC_TAG_MASK;
1459
1460         if (id >= fnic->fnic_max_tag_id)
1461                 return;
1462
1463         sc = scsi_host_find_tag(fnic->lport->host, id);
1464         if (!sc)
1465                 return;
1466
1467         io_lock = fnic_io_lock_hash(fnic, sc);
1468         spin_lock_irqsave(io_lock, flags);
1469
1470         /* Get the IO context which this desc refers to */
1471         io_req = (struct fnic_io_req *)CMD_SP(sc);
1472
1473         /* fnic interrupts are turned off by now */
1474
1475         if (!io_req) {
1476                 spin_unlock_irqrestore(io_lock, flags);
1477                 goto wq_copy_cleanup_scsi_cmd;
1478         }
1479
1480         CMD_SP(sc) = NULL;
1481
1482         spin_unlock_irqrestore(io_lock, flags);
1483
1484         start_time = io_req->start_time;
1485         fnic_release_ioreq_buf(fnic, io_req, sc);
1486         mempool_free(io_req, fnic->io_req_pool);
1487
1488 wq_copy_cleanup_scsi_cmd:
1489         sc->result = DID_NO_CONNECT << 16;
1490         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1491                       " DID_NO_CONNECT\n");
1492
1493         FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1494                    sc->device->host->host_no, id, sc,
1495                    jiffies_to_msecs(jiffies - start_time),
1496                    0, ((u64)sc->cmnd[0] << 32 |
1497                        (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1498                        (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1499                    (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1500
1501         scsi_done(sc);
1502 }
1503
1504 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1505                                           u32 task_req, u8 *fc_lun,
1506                                           struct fnic_io_req *io_req)
1507 {
1508         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1509         struct Scsi_Host *host = fnic->lport->host;
1510         struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1511         unsigned long flags;
1512
1513         spin_lock_irqsave(host->host_lock, flags);
1514         if (unlikely(fnic_chk_state_flags_locked(fnic,
1515                                                 FNIC_FLAGS_IO_BLOCKED))) {
1516                 spin_unlock_irqrestore(host->host_lock, flags);
1517                 return 1;
1518         } else
1519                 atomic_inc(&fnic->in_flight);
1520         spin_unlock_irqrestore(host->host_lock, flags);
1521
1522         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1523
1524         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1525                 free_wq_copy_descs(fnic, wq);
1526
1527         if (!vnic_wq_copy_desc_avail(wq)) {
1528                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1529                 atomic_dec(&fnic->in_flight);
1530                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1531                         "fnic_queue_abort_io_req: failure: no descriptors\n");
1532                 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1533                 return 1;
1534         }
1535         fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1536                                      0, task_req, tag, fc_lun, io_req->port_id,
1537                                      fnic->config.ra_tov, fnic->config.ed_tov);
1538
1539         atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1540         if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1541                   atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1542                 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1543                   atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1544
1545         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1546         atomic_dec(&fnic->in_flight);
1547
1548         return 0;
1549 }
1550
1551 struct fnic_rport_abort_io_iter_data {
1552         struct fnic *fnic;
1553         u32 port_id;
1554         int term_cnt;
1555 };
1556
1557 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data,
1558                                      bool reserved)
1559 {
1560         struct fnic_rport_abort_io_iter_data *iter_data = data;
1561         struct fnic *fnic = iter_data->fnic;
1562         int abt_tag = scsi_cmd_to_rq(sc)->tag;
1563         struct fnic_io_req *io_req;
1564         spinlock_t *io_lock;
1565         unsigned long flags;
1566         struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1567         struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1568         struct scsi_lun fc_lun;
1569         enum fnic_ioreq_state old_ioreq_state;
1570
1571         io_lock = fnic_io_lock_tag(fnic, abt_tag);
1572         spin_lock_irqsave(io_lock, flags);
1573
1574         io_req = (struct fnic_io_req *)CMD_SP(sc);
1575
1576         if (!io_req || io_req->port_id != iter_data->port_id) {
1577                 spin_unlock_irqrestore(io_lock, flags);
1578                 return true;
1579         }
1580
1581         if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1582             (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1583                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1584                         "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1585                         sc);
1586                 spin_unlock_irqrestore(io_lock, flags);
1587                 return true;
1588         }
1589
1590         /*
1591          * Found IO that is still pending with firmware and
1592          * belongs to rport that went away
1593          */
1594         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1595                 spin_unlock_irqrestore(io_lock, flags);
1596                 return true;
1597         }
1598         if (io_req->abts_done) {
1599                 shost_printk(KERN_ERR, fnic->lport->host,
1600                         "fnic_rport_exch_reset: io_req->abts_done is set "
1601                         "state is %s\n",
1602                         fnic_ioreq_state_to_str(CMD_STATE(sc)));
1603         }
1604
1605         if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1606                 shost_printk(KERN_ERR, fnic->lport->host,
1607                              "rport_exch_reset "
1608                              "IO not yet issued %p tag 0x%x flags "
1609                              "%x state %d\n",
1610                              sc, abt_tag, CMD_FLAGS(sc), CMD_STATE(sc));
1611         }
1612         old_ioreq_state = CMD_STATE(sc);
1613         CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1614         CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1615         if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1616                 atomic64_inc(&reset_stats->device_reset_terminates);
1617                 abt_tag |= FNIC_TAG_DEV_RST;
1618         }
1619         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1620                       "fnic_rport_exch_reset dev rst sc 0x%p\n", sc);
1621         BUG_ON(io_req->abts_done);
1622
1623         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1624                       "fnic_rport_reset_exch: Issuing abts\n");
1625
1626         spin_unlock_irqrestore(io_lock, flags);
1627
1628         /* Now queue the abort command to firmware */
1629         int_to_scsilun(sc->device->lun, &fc_lun);
1630
1631         if (fnic_queue_abort_io_req(fnic, abt_tag,
1632                                     FCPIO_ITMF_ABT_TASK_TERM,
1633                                     fc_lun.scsi_lun, io_req)) {
1634                 /*
1635                  * Revert the cmd state back to old state, if
1636                  * it hasn't changed in between. This cmd will get
1637                  * aborted later by scsi_eh, or cleaned up during
1638                  * lun reset
1639                  */
1640                 spin_lock_irqsave(io_lock, flags);
1641                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1642                         CMD_STATE(sc) = old_ioreq_state;
1643                 spin_unlock_irqrestore(io_lock, flags);
1644         } else {
1645                 spin_lock_irqsave(io_lock, flags);
1646                 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1647                         CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1648                 else
1649                         CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1650                 spin_unlock_irqrestore(io_lock, flags);
1651                 atomic64_inc(&term_stats->terminates);
1652                 iter_data->term_cnt++;
1653         }
1654         return true;
1655 }
1656
1657 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1658 {
1659         struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1660         struct fnic_rport_abort_io_iter_data iter_data = {
1661                 .fnic = fnic,
1662                 .port_id = port_id,
1663                 .term_cnt = 0,
1664         };
1665
1666         FNIC_SCSI_DBG(KERN_DEBUG,
1667                       fnic->lport->host,
1668                       "fnic_rport_exch_reset called portid 0x%06x\n",
1669                       port_id);
1670
1671         if (fnic->in_remove)
1672                 return;
1673
1674         scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter,
1675                             &iter_data);
1676         if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates))
1677                 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt);
1678
1679 }
1680
1681 void fnic_terminate_rport_io(struct fc_rport *rport)
1682 {
1683         struct fc_rport_libfc_priv *rdata;
1684         struct fc_lport *lport;
1685         struct fnic *fnic;
1686
1687         if (!rport) {
1688                 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1689                 return;
1690         }
1691         rdata = rport->dd_data;
1692
1693         if (!rdata) {
1694                 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1695                 return;
1696         }
1697         lport = rdata->local_port;
1698
1699         if (!lport) {
1700                 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1701                 return;
1702         }
1703         fnic = lport_priv(lport);
1704         FNIC_SCSI_DBG(KERN_DEBUG,
1705                       fnic->lport->host, "fnic_terminate_rport_io called"
1706                       " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1707                       rport->port_name, rport->node_name, rport,
1708                       rport->port_id);
1709
1710         if (fnic->in_remove)
1711                 return;
1712
1713         fnic_rport_exch_reset(fnic, rport->port_id);
1714 }
1715
1716 /*
1717  * This function is exported to SCSI for sending abort cmnds.
1718  * A SCSI IO is represented by a io_req in the driver.
1719  * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1720  */
1721 int fnic_abort_cmd(struct scsi_cmnd *sc)
1722 {
1723         struct request *const rq = scsi_cmd_to_rq(sc);
1724         struct fc_lport *lp;
1725         struct fnic *fnic;
1726         struct fnic_io_req *io_req = NULL;
1727         struct fc_rport *rport;
1728         spinlock_t *io_lock;
1729         unsigned long flags;
1730         unsigned long start_time = 0;
1731         int ret = SUCCESS;
1732         u32 task_req = 0;
1733         struct scsi_lun fc_lun;
1734         struct fnic_stats *fnic_stats;
1735         struct abort_stats *abts_stats;
1736         struct terminate_stats *term_stats;
1737         enum fnic_ioreq_state old_ioreq_state;
1738         const int tag = rq->tag;
1739         unsigned long abt_issued_time;
1740         DECLARE_COMPLETION_ONSTACK(tm_done);
1741
1742         /* Wait for rport to unblock */
1743         fc_block_scsi_eh(sc);
1744
1745         /* Get local-port, check ready and link up */
1746         lp = shost_priv(sc->device->host);
1747
1748         fnic = lport_priv(lp);
1749         fnic_stats = &fnic->fnic_stats;
1750         abts_stats = &fnic->fnic_stats.abts_stats;
1751         term_stats = &fnic->fnic_stats.term_stats;
1752
1753         rport = starget_to_rport(scsi_target(sc->device));
1754         FNIC_SCSI_DBG(KERN_DEBUG,
1755                 fnic->lport->host,
1756                 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1757                 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1758
1759         CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1760
1761         if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1762                 ret = FAILED;
1763                 goto fnic_abort_cmd_end;
1764         }
1765
1766         /*
1767          * Avoid a race between SCSI issuing the abort and the device
1768          * completing the command.
1769          *
1770          * If the command is already completed by the fw cmpl code,
1771          * we just return SUCCESS from here. This means that the abort
1772          * succeeded. In the SCSI ML, since the timeout for command has
1773          * happened, the completion wont actually complete the command
1774          * and it will be considered as an aborted command
1775          *
1776          * The CMD_SP will not be cleared except while holding io_req_lock.
1777          */
1778         io_lock = fnic_io_lock_hash(fnic, sc);
1779         spin_lock_irqsave(io_lock, flags);
1780         io_req = (struct fnic_io_req *)CMD_SP(sc);
1781         if (!io_req) {
1782                 spin_unlock_irqrestore(io_lock, flags);
1783                 goto fnic_abort_cmd_end;
1784         }
1785
1786         io_req->abts_done = &tm_done;
1787
1788         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1789                 spin_unlock_irqrestore(io_lock, flags);
1790                 goto wait_pending;
1791         }
1792
1793         abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1794         if (abt_issued_time <= 6000)
1795                 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
1796         else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
1797                 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
1798         else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
1799                 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
1800         else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
1801                 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
1802         else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
1803                 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
1804         else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
1805                 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
1806         else
1807                 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
1808
1809         FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1810                 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
1811         /*
1812          * Command is still pending, need to abort it
1813          * If the firmware completes the command after this point,
1814          * the completion wont be done till mid-layer, since abort
1815          * has already started.
1816          */
1817         old_ioreq_state = CMD_STATE(sc);
1818         CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1819         CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1820
1821         spin_unlock_irqrestore(io_lock, flags);
1822
1823         /*
1824          * Check readiness of the remote port. If the path to remote
1825          * port is up, then send abts to the remote port to terminate
1826          * the IO. Else, just locally terminate the IO in the firmware
1827          */
1828         if (fc_remote_port_chkready(rport) == 0)
1829                 task_req = FCPIO_ITMF_ABT_TASK;
1830         else {
1831                 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1832                 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1833         }
1834
1835         /* Now queue the abort command to firmware */
1836         int_to_scsilun(sc->device->lun, &fc_lun);
1837
1838         if (fnic_queue_abort_io_req(fnic, tag, task_req, fc_lun.scsi_lun,
1839                                     io_req)) {
1840                 spin_lock_irqsave(io_lock, flags);
1841                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1842                         CMD_STATE(sc) = old_ioreq_state;
1843                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1844                 if (io_req)
1845                         io_req->abts_done = NULL;
1846                 spin_unlock_irqrestore(io_lock, flags);
1847                 ret = FAILED;
1848                 goto fnic_abort_cmd_end;
1849         }
1850         if (task_req == FCPIO_ITMF_ABT_TASK) {
1851                 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1852                 atomic64_inc(&fnic_stats->abts_stats.aborts);
1853         } else {
1854                 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1855                 atomic64_inc(&fnic_stats->term_stats.terminates);
1856         }
1857
1858         /*
1859          * We queued an abort IO, wait for its completion.
1860          * Once the firmware completes the abort command, it will
1861          * wake up this thread.
1862          */
1863  wait_pending:
1864         wait_for_completion_timeout(&tm_done,
1865                                     msecs_to_jiffies
1866                                     (2 * fnic->config.ra_tov +
1867                                      fnic->config.ed_tov));
1868
1869         /* Check the abort status */
1870         spin_lock_irqsave(io_lock, flags);
1871
1872         io_req = (struct fnic_io_req *)CMD_SP(sc);
1873         if (!io_req) {
1874                 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1875                 spin_unlock_irqrestore(io_lock, flags);
1876                 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1877                 ret = FAILED;
1878                 goto fnic_abort_cmd_end;
1879         }
1880         io_req->abts_done = NULL;
1881
1882         /* fw did not complete abort, timed out */
1883         if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1884                 spin_unlock_irqrestore(io_lock, flags);
1885                 if (task_req == FCPIO_ITMF_ABT_TASK) {
1886                         atomic64_inc(&abts_stats->abort_drv_timeouts);
1887                 } else {
1888                         atomic64_inc(&term_stats->terminate_drv_timeouts);
1889                 }
1890                 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1891                 ret = FAILED;
1892                 goto fnic_abort_cmd_end;
1893         }
1894
1895         /* IO out of order */
1896
1897         if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1898                 spin_unlock_irqrestore(io_lock, flags);
1899                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1900                         "Issuing Host reset due to out of order IO\n");
1901
1902                 ret = FAILED;
1903                 goto fnic_abort_cmd_end;
1904         }
1905
1906         CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1907
1908         start_time = io_req->start_time;
1909         /*
1910          * firmware completed the abort, check the status,
1911          * free the io_req if successful. If abort fails,
1912          * Device reset will clean the I/O.
1913          */
1914         if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS)
1915                 CMD_SP(sc) = NULL;
1916         else {
1917                 ret = FAILED;
1918                 spin_unlock_irqrestore(io_lock, flags);
1919                 goto fnic_abort_cmd_end;
1920         }
1921
1922         spin_unlock_irqrestore(io_lock, flags);
1923
1924         fnic_release_ioreq_buf(fnic, io_req, sc);
1925         mempool_free(io_req, fnic->io_req_pool);
1926
1927         /* Call SCSI completion function to complete the IO */
1928         sc->result = DID_ABORT << 16;
1929         scsi_done(sc);
1930         atomic64_dec(&fnic_stats->io_stats.active_ios);
1931         if (atomic64_read(&fnic->io_cmpl_skip))
1932                 atomic64_dec(&fnic->io_cmpl_skip);
1933         else
1934                 atomic64_inc(&fnic_stats->io_stats.io_completions);
1935
1936 fnic_abort_cmd_end:
1937         FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, tag, sc,
1938                   jiffies_to_msecs(jiffies - start_time),
1939                   0, ((u64)sc->cmnd[0] << 32 |
1940                   (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1941                   (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1942                   (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1943
1944         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1945                       "Returning from abort cmd type %x %s\n", task_req,
1946                       (ret == SUCCESS) ?
1947                       "SUCCESS" : "FAILED");
1948         return ret;
1949 }
1950
1951 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1952                                        struct scsi_cmnd *sc,
1953                                        struct fnic_io_req *io_req)
1954 {
1955         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1956         struct Scsi_Host *host = fnic->lport->host;
1957         struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1958         struct scsi_lun fc_lun;
1959         int ret = 0;
1960         unsigned long intr_flags;
1961
1962         spin_lock_irqsave(host->host_lock, intr_flags);
1963         if (unlikely(fnic_chk_state_flags_locked(fnic,
1964                                                 FNIC_FLAGS_IO_BLOCKED))) {
1965                 spin_unlock_irqrestore(host->host_lock, intr_flags);
1966                 return FAILED;
1967         } else
1968                 atomic_inc(&fnic->in_flight);
1969         spin_unlock_irqrestore(host->host_lock, intr_flags);
1970
1971         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1972
1973         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1974                 free_wq_copy_descs(fnic, wq);
1975
1976         if (!vnic_wq_copy_desc_avail(wq)) {
1977                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1978                           "queue_dr_io_req failure - no descriptors\n");
1979                 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
1980                 ret = -EAGAIN;
1981                 goto lr_io_req_end;
1982         }
1983
1984         /* fill in the lun info */
1985         int_to_scsilun(sc->device->lun, &fc_lun);
1986
1987         fnic_queue_wq_copy_desc_itmf(wq, scsi_cmd_to_rq(sc)->tag | FNIC_TAG_DEV_RST,
1988                                      0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1989                                      fc_lun.scsi_lun, io_req->port_id,
1990                                      fnic->config.ra_tov, fnic->config.ed_tov);
1991
1992         atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1993         if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1994                   atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1995                 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1996                   atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1997
1998 lr_io_req_end:
1999         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
2000         atomic_dec(&fnic->in_flight);
2001
2002         return ret;
2003 }
2004
2005 struct fnic_pending_aborts_iter_data {
2006         struct fnic *fnic;
2007         struct scsi_cmnd *lr_sc;
2008         struct scsi_device *lun_dev;
2009         int ret;
2010 };
2011
2012 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc,
2013                                      void *data, bool reserved)
2014 {
2015         struct fnic_pending_aborts_iter_data *iter_data = data;
2016         struct fnic *fnic = iter_data->fnic;
2017         struct scsi_device *lun_dev = iter_data->lun_dev;
2018         int abt_tag = scsi_cmd_to_rq(sc)->tag;
2019         struct fnic_io_req *io_req;
2020         spinlock_t *io_lock;
2021         unsigned long flags;
2022         struct scsi_lun fc_lun;
2023         DECLARE_COMPLETION_ONSTACK(tm_done);
2024         enum fnic_ioreq_state old_ioreq_state;
2025
2026         if (sc == iter_data->lr_sc || sc->device != lun_dev)
2027                 return true;
2028         if (reserved)
2029                 return true;
2030
2031         io_lock = fnic_io_lock_tag(fnic, abt_tag);
2032         spin_lock_irqsave(io_lock, flags);
2033         io_req = (struct fnic_io_req *)CMD_SP(sc);
2034         if (!io_req) {
2035                 spin_unlock_irqrestore(io_lock, flags);
2036                 return true;
2037         }
2038
2039         /*
2040          * Found IO that is still pending with firmware and
2041          * belongs to the LUN that we are resetting
2042          */
2043         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2044                       "Found IO in %s on lun\n",
2045                       fnic_ioreq_state_to_str(CMD_STATE(sc)));
2046
2047         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2048                 spin_unlock_irqrestore(io_lock, flags);
2049                 return true;
2050         }
2051         if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2052             (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2053                 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2054                               "%s dev rst not pending sc 0x%p\n", __func__,
2055                               sc);
2056                 spin_unlock_irqrestore(io_lock, flags);
2057                 return true;
2058         }
2059
2060         if (io_req->abts_done)
2061                 shost_printk(KERN_ERR, fnic->lport->host,
2062                              "%s: io_req->abts_done is set state is %s\n",
2063                              __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2064         old_ioreq_state = CMD_STATE(sc);
2065         /*
2066          * Any pending IO issued prior to reset is expected to be
2067          * in abts pending state, if not we need to set
2068          * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2069          * When IO is completed, the IO will be handed over and
2070          * handled in this function.
2071          */
2072         CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2073
2074         BUG_ON(io_req->abts_done);
2075
2076         if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2077                 abt_tag |= FNIC_TAG_DEV_RST;
2078                 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2079                               "%s: dev rst sc 0x%p\n", __func__, sc);
2080         }
2081
2082         CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2083         io_req->abts_done = &tm_done;
2084         spin_unlock_irqrestore(io_lock, flags);
2085
2086         /* Now queue the abort command to firmware */
2087         int_to_scsilun(sc->device->lun, &fc_lun);
2088
2089         if (fnic_queue_abort_io_req(fnic, abt_tag,
2090                                     FCPIO_ITMF_ABT_TASK_TERM,
2091                                     fc_lun.scsi_lun, io_req)) {
2092                 spin_lock_irqsave(io_lock, flags);
2093                 io_req = (struct fnic_io_req *)CMD_SP(sc);
2094                 if (io_req)
2095                         io_req->abts_done = NULL;
2096                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2097                         CMD_STATE(sc) = old_ioreq_state;
2098                 spin_unlock_irqrestore(io_lock, flags);
2099                 iter_data->ret = FAILED;
2100                 return false;
2101         } else {
2102                 spin_lock_irqsave(io_lock, flags);
2103                 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2104                         CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2105                 spin_unlock_irqrestore(io_lock, flags);
2106         }
2107         CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2108
2109         wait_for_completion_timeout(&tm_done, msecs_to_jiffies
2110                                     (fnic->config.ed_tov));
2111
2112         /* Recheck cmd state to check if it is now aborted */
2113         spin_lock_irqsave(io_lock, flags);
2114         io_req = (struct fnic_io_req *)CMD_SP(sc);
2115         if (!io_req) {
2116                 spin_unlock_irqrestore(io_lock, flags);
2117                 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2118                 return true;
2119         }
2120
2121         io_req->abts_done = NULL;
2122
2123         /* if abort is still pending with fw, fail */
2124         if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2125                 spin_unlock_irqrestore(io_lock, flags);
2126                 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2127                 iter_data->ret = FAILED;
2128                 return false;
2129         }
2130         CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2131
2132         /* original sc used for lr is handled by dev reset code */
2133         if (sc != iter_data->lr_sc)
2134                 CMD_SP(sc) = NULL;
2135         spin_unlock_irqrestore(io_lock, flags);
2136
2137         /* original sc used for lr is handled by dev reset code */
2138         if (sc != iter_data->lr_sc) {
2139                 fnic_release_ioreq_buf(fnic, io_req, sc);
2140                 mempool_free(io_req, fnic->io_req_pool);
2141         }
2142
2143         /*
2144          * Any IO is returned during reset, it needs to call scsi_done
2145          * to return the scsi_cmnd to upper layer.
2146          */
2147         /* Set result to let upper SCSI layer retry */
2148         sc->result = DID_RESET << 16;
2149         scsi_done(sc);
2150
2151         return true;
2152 }
2153
2154 /*
2155  * Clean up any pending aborts on the lun
2156  * For each outstanding IO on this lun, whose abort is not completed by fw,
2157  * issue a local abort. Wait for abort to complete. Return 0 if all commands
2158  * successfully aborted, 1 otherwise
2159  */
2160 static int fnic_clean_pending_aborts(struct fnic *fnic,
2161                                      struct scsi_cmnd *lr_sc,
2162                                      bool new_sc)
2163
2164 {
2165         int ret = SUCCESS;
2166         struct fnic_pending_aborts_iter_data iter_data = {
2167                 .fnic = fnic,
2168                 .lun_dev = lr_sc->device,
2169                 .ret = SUCCESS,
2170         };
2171
2172         if (new_sc)
2173                 iter_data.lr_sc = lr_sc;
2174
2175         scsi_host_busy_iter(fnic->lport->host,
2176                             fnic_pending_aborts_iter, &iter_data);
2177         if (iter_data.ret == FAILED) {
2178                 ret = iter_data.ret;
2179                 goto clean_pending_aborts_end;
2180         }
2181         schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2182
2183         /* walk again to check, if IOs are still pending in fw */
2184         if (fnic_is_abts_pending(fnic, lr_sc))
2185                 ret = FAILED;
2186
2187 clean_pending_aborts_end:
2188         return ret;
2189 }
2190
2191 /*
2192  * fnic_scsi_host_start_tag
2193  * Allocates tagid from host's tag list
2194  **/
2195 static inline int
2196 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2197 {
2198         struct request *rq = scsi_cmd_to_rq(sc);
2199         struct request_queue *q = rq->q;
2200         struct request *dummy;
2201
2202         dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT);
2203         if (IS_ERR(dummy))
2204                 return SCSI_NO_TAG;
2205
2206         rq->tag = dummy->tag;
2207         sc->host_scribble = (unsigned char *)dummy;
2208
2209         return dummy->tag;
2210 }
2211
2212 /*
2213  * fnic_scsi_host_end_tag
2214  * frees tag allocated by fnic_scsi_host_start_tag.
2215  **/
2216 static inline void
2217 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2218 {
2219         struct request *dummy = (struct request *)sc->host_scribble;
2220
2221         blk_mq_free_request(dummy);
2222 }
2223
2224 /*
2225  * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2226  * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2227  * on the LUN.
2228  */
2229 int fnic_device_reset(struct scsi_cmnd *sc)
2230 {
2231         struct request *rq = scsi_cmd_to_rq(sc);
2232         struct fc_lport *lp;
2233         struct fnic *fnic;
2234         struct fnic_io_req *io_req = NULL;
2235         struct fc_rport *rport;
2236         int status;
2237         int ret = FAILED;
2238         spinlock_t *io_lock;
2239         unsigned long flags;
2240         unsigned long start_time = 0;
2241         struct scsi_lun fc_lun;
2242         struct fnic_stats *fnic_stats;
2243         struct reset_stats *reset_stats;
2244         int tag = rq->tag;
2245         DECLARE_COMPLETION_ONSTACK(tm_done);
2246         int tag_gen_flag = 0;   /*to track tags allocated by fnic driver*/
2247         bool new_sc = 0;
2248
2249         /* Wait for rport to unblock */
2250         fc_block_scsi_eh(sc);
2251
2252         /* Get local-port, check ready and link up */
2253         lp = shost_priv(sc->device->host);
2254
2255         fnic = lport_priv(lp);
2256         fnic_stats = &fnic->fnic_stats;
2257         reset_stats = &fnic->fnic_stats.reset_stats;
2258
2259         atomic64_inc(&reset_stats->device_resets);
2260
2261         rport = starget_to_rport(scsi_target(sc->device));
2262         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2263                       "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2264                       rport->port_id, sc->device->lun, sc);
2265
2266         if (lp->state != LPORT_ST_READY || !(lp->link_up))
2267                 goto fnic_device_reset_end;
2268
2269         /* Check if remote port up */
2270         if (fc_remote_port_chkready(rport)) {
2271                 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2272                 goto fnic_device_reset_end;
2273         }
2274
2275         CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2276         /* Allocate tag if not present */
2277
2278         if (unlikely(tag < 0)) {
2279                 /*
2280                  * Really should fix the midlayer to pass in a proper
2281                  * request for ioctls...
2282                  */
2283                 tag = fnic_scsi_host_start_tag(fnic, sc);
2284                 if (unlikely(tag == SCSI_NO_TAG))
2285                         goto fnic_device_reset_end;
2286                 tag_gen_flag = 1;
2287                 new_sc = 1;
2288         }
2289         io_lock = fnic_io_lock_hash(fnic, sc);
2290         spin_lock_irqsave(io_lock, flags);
2291         io_req = (struct fnic_io_req *)CMD_SP(sc);
2292
2293         /*
2294          * If there is a io_req attached to this command, then use it,
2295          * else allocate a new one.
2296          */
2297         if (!io_req) {
2298                 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2299                 if (!io_req) {
2300                         spin_unlock_irqrestore(io_lock, flags);
2301                         goto fnic_device_reset_end;
2302                 }
2303                 memset(io_req, 0, sizeof(*io_req));
2304                 io_req->port_id = rport->port_id;
2305                 CMD_SP(sc) = (char *)io_req;
2306         }
2307         io_req->dr_done = &tm_done;
2308         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2309         CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2310         spin_unlock_irqrestore(io_lock, flags);
2311
2312         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2313
2314         /*
2315          * issue the device reset, if enqueue failed, clean up the ioreq
2316          * and break assoc with scsi cmd
2317          */
2318         if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2319                 spin_lock_irqsave(io_lock, flags);
2320                 io_req = (struct fnic_io_req *)CMD_SP(sc);
2321                 if (io_req)
2322                         io_req->dr_done = NULL;
2323                 goto fnic_device_reset_clean;
2324         }
2325         spin_lock_irqsave(io_lock, flags);
2326         CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2327         spin_unlock_irqrestore(io_lock, flags);
2328
2329         /*
2330          * Wait on the local completion for LUN reset.  The io_req may be
2331          * freed while we wait since we hold no lock.
2332          */
2333         wait_for_completion_timeout(&tm_done,
2334                                     msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2335
2336         spin_lock_irqsave(io_lock, flags);
2337         io_req = (struct fnic_io_req *)CMD_SP(sc);
2338         if (!io_req) {
2339                 spin_unlock_irqrestore(io_lock, flags);
2340                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2341                                 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2342                 goto fnic_device_reset_end;
2343         }
2344         io_req->dr_done = NULL;
2345
2346         status = CMD_LR_STATUS(sc);
2347
2348         /*
2349          * If lun reset not completed, bail out with failed. io_req
2350          * gets cleaned up during higher levels of EH
2351          */
2352         if (status == FCPIO_INVALID_CODE) {
2353                 atomic64_inc(&reset_stats->device_reset_timeouts);
2354                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2355                               "Device reset timed out\n");
2356                 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2357                 spin_unlock_irqrestore(io_lock, flags);
2358                 int_to_scsilun(sc->device->lun, &fc_lun);
2359                 /*
2360                  * Issue abort and terminate on device reset request.
2361                  * If q'ing of terminate fails, retry it after a delay.
2362                  */
2363                 while (1) {
2364                         spin_lock_irqsave(io_lock, flags);
2365                         if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2366                                 spin_unlock_irqrestore(io_lock, flags);
2367                                 break;
2368                         }
2369                         spin_unlock_irqrestore(io_lock, flags);
2370                         if (fnic_queue_abort_io_req(fnic,
2371                                 tag | FNIC_TAG_DEV_RST,
2372                                 FCPIO_ITMF_ABT_TASK_TERM,
2373                                 fc_lun.scsi_lun, io_req)) {
2374                                 wait_for_completion_timeout(&tm_done,
2375                                 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2376                         } else {
2377                                 spin_lock_irqsave(io_lock, flags);
2378                                 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2379                                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2380                                 io_req->abts_done = &tm_done;
2381                                 spin_unlock_irqrestore(io_lock, flags);
2382                                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2383                                 "Abort and terminate issued on Device reset "
2384                                 "tag 0x%x sc 0x%p\n", tag, sc);
2385                                 break;
2386                         }
2387                 }
2388                 while (1) {
2389                         spin_lock_irqsave(io_lock, flags);
2390                         if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2391                                 spin_unlock_irqrestore(io_lock, flags);
2392                                 wait_for_completion_timeout(&tm_done,
2393                                 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2394                                 break;
2395                         } else {
2396                                 io_req = (struct fnic_io_req *)CMD_SP(sc);
2397                                 io_req->abts_done = NULL;
2398                                 goto fnic_device_reset_clean;
2399                         }
2400                 }
2401         } else {
2402                 spin_unlock_irqrestore(io_lock, flags);
2403         }
2404
2405         /* Completed, but not successful, clean up the io_req, return fail */
2406         if (status != FCPIO_SUCCESS) {
2407                 spin_lock_irqsave(io_lock, flags);
2408                 FNIC_SCSI_DBG(KERN_DEBUG,
2409                               fnic->lport->host,
2410                               "Device reset completed - failed\n");
2411                 io_req = (struct fnic_io_req *)CMD_SP(sc);
2412                 goto fnic_device_reset_clean;
2413         }
2414
2415         /*
2416          * Clean up any aborts on this lun that have still not
2417          * completed. If any of these fail, then LUN reset fails.
2418          * clean_pending_aborts cleans all cmds on this lun except
2419          * the lun reset cmd. If all cmds get cleaned, the lun reset
2420          * succeeds
2421          */
2422         if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
2423                 spin_lock_irqsave(io_lock, flags);
2424                 io_req = (struct fnic_io_req *)CMD_SP(sc);
2425                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2426                               "Device reset failed"
2427                               " since could not abort all IOs\n");
2428                 goto fnic_device_reset_clean;
2429         }
2430
2431         /* Clean lun reset command */
2432         spin_lock_irqsave(io_lock, flags);
2433         io_req = (struct fnic_io_req *)CMD_SP(sc);
2434         if (io_req)
2435                 /* Completed, and successful */
2436                 ret = SUCCESS;
2437
2438 fnic_device_reset_clean:
2439         if (io_req)
2440                 CMD_SP(sc) = NULL;
2441
2442         spin_unlock_irqrestore(io_lock, flags);
2443
2444         if (io_req) {
2445                 start_time = io_req->start_time;
2446                 fnic_release_ioreq_buf(fnic, io_req, sc);
2447                 mempool_free(io_req, fnic->io_req_pool);
2448         }
2449
2450 fnic_device_reset_end:
2451         FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc,
2452                   jiffies_to_msecs(jiffies - start_time),
2453                   0, ((u64)sc->cmnd[0] << 32 |
2454                   (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2455                   (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2456                   (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2457
2458         /* free tag if it is allocated */
2459         if (unlikely(tag_gen_flag))
2460                 fnic_scsi_host_end_tag(fnic, sc);
2461
2462         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2463                       "Returning from device reset %s\n",
2464                       (ret == SUCCESS) ?
2465                       "SUCCESS" : "FAILED");
2466
2467         if (ret == FAILED)
2468                 atomic64_inc(&reset_stats->device_reset_failures);
2469
2470         return ret;
2471 }
2472
2473 /* Clean up all IOs, clean up libFC local port */
2474 int fnic_reset(struct Scsi_Host *shost)
2475 {
2476         struct fc_lport *lp;
2477         struct fnic *fnic;
2478         int ret = 0;
2479         struct reset_stats *reset_stats;
2480
2481         lp = shost_priv(shost);
2482         fnic = lport_priv(lp);
2483         reset_stats = &fnic->fnic_stats.reset_stats;
2484
2485         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2486                       "fnic_reset called\n");
2487
2488         atomic64_inc(&reset_stats->fnic_resets);
2489
2490         /*
2491          * Reset local port, this will clean up libFC exchanges,
2492          * reset remote port sessions, and if link is up, begin flogi
2493          */
2494         ret = fc_lport_reset(lp);
2495
2496         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2497                       "Returning from fnic reset %s\n",
2498                       (ret == 0) ?
2499                       "SUCCESS" : "FAILED");
2500
2501         if (ret == 0)
2502                 atomic64_inc(&reset_stats->fnic_reset_completions);
2503         else
2504                 atomic64_inc(&reset_stats->fnic_reset_failures);
2505
2506         return ret;
2507 }
2508
2509 /*
2510  * SCSI Error handling calls driver's eh_host_reset if all prior
2511  * error handling levels return FAILED. If host reset completes
2512  * successfully, and if link is up, then Fabric login begins.
2513  *
2514  * Host Reset is the highest level of error recovery. If this fails, then
2515  * host is offlined by SCSI.
2516  *
2517  */
2518 int fnic_host_reset(struct scsi_cmnd *sc)
2519 {
2520         int ret;
2521         unsigned long wait_host_tmo;
2522         struct Scsi_Host *shost = sc->device->host;
2523         struct fc_lport *lp = shost_priv(shost);
2524         struct fnic *fnic = lport_priv(lp);
2525         unsigned long flags;
2526
2527         spin_lock_irqsave(&fnic->fnic_lock, flags);
2528         if (!fnic->internal_reset_inprogress) {
2529                 fnic->internal_reset_inprogress = true;
2530         } else {
2531                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2532                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2533                         "host reset in progress skipping another host reset\n");
2534                 return SUCCESS;
2535         }
2536         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2537
2538         /*
2539          * If fnic_reset is successful, wait for fabric login to complete
2540          * scsi-ml tries to send a TUR to every device if host reset is
2541          * successful, so before returning to scsi, fabric should be up
2542          */
2543         ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2544         if (ret == SUCCESS) {
2545                 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2546                 ret = FAILED;
2547                 while (time_before(jiffies, wait_host_tmo)) {
2548                         if ((lp->state == LPORT_ST_READY) &&
2549                             (lp->link_up)) {
2550                                 ret = SUCCESS;
2551                                 break;
2552                         }
2553                         ssleep(1);
2554                 }
2555         }
2556
2557         spin_lock_irqsave(&fnic->fnic_lock, flags);
2558         fnic->internal_reset_inprogress = false;
2559         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2560         return ret;
2561 }
2562
2563 /*
2564  * This fxn is called from libFC when host is removed
2565  */
2566 void fnic_scsi_abort_io(struct fc_lport *lp)
2567 {
2568         int err = 0;
2569         unsigned long flags;
2570         enum fnic_state old_state;
2571         struct fnic *fnic = lport_priv(lp);
2572         DECLARE_COMPLETION_ONSTACK(remove_wait);
2573
2574         /* Issue firmware reset for fnic, wait for reset to complete */
2575 retry_fw_reset:
2576         spin_lock_irqsave(&fnic->fnic_lock, flags);
2577         if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) &&
2578                      fnic->link_events) {
2579                 /* fw reset is in progress, poll for its completion */
2580                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2581                 schedule_timeout(msecs_to_jiffies(100));
2582                 goto retry_fw_reset;
2583         }
2584
2585         fnic->remove_wait = &remove_wait;
2586         old_state = fnic->state;
2587         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2588         fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2589         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2590
2591         err = fnic_fw_reset_handler(fnic);
2592         if (err) {
2593                 spin_lock_irqsave(&fnic->fnic_lock, flags);
2594                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2595                         fnic->state = old_state;
2596                 fnic->remove_wait = NULL;
2597                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2598                 return;
2599         }
2600
2601         /* Wait for firmware reset to complete */
2602         wait_for_completion_timeout(&remove_wait,
2603                                     msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2604
2605         spin_lock_irqsave(&fnic->fnic_lock, flags);
2606         fnic->remove_wait = NULL;
2607         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2608                       "fnic_scsi_abort_io %s\n",
2609                       (fnic->state == FNIC_IN_ETH_MODE) ?
2610                       "SUCCESS" : "FAILED");
2611         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2612
2613 }
2614
2615 /*
2616  * This fxn called from libFC to clean up driver IO state on link down
2617  */
2618 void fnic_scsi_cleanup(struct fc_lport *lp)
2619 {
2620         unsigned long flags;
2621         enum fnic_state old_state;
2622         struct fnic *fnic = lport_priv(lp);
2623
2624         /* issue fw reset */
2625 retry_fw_reset:
2626         spin_lock_irqsave(&fnic->fnic_lock, flags);
2627         if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2628                 /* fw reset is in progress, poll for its completion */
2629                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2630                 schedule_timeout(msecs_to_jiffies(100));
2631                 goto retry_fw_reset;
2632         }
2633         old_state = fnic->state;
2634         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2635         fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2636         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2637
2638         if (fnic_fw_reset_handler(fnic)) {
2639                 spin_lock_irqsave(&fnic->fnic_lock, flags);
2640                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2641                         fnic->state = old_state;
2642                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2643         }
2644
2645 }
2646
2647 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2648 {
2649 }
2650
2651 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2652 {
2653         struct fnic *fnic = lport_priv(lp);
2654
2655         /* Non-zero sid, nothing to do */
2656         if (sid)
2657                 goto call_fc_exch_mgr_reset;
2658
2659         if (did) {
2660                 fnic_rport_exch_reset(fnic, did);
2661                 goto call_fc_exch_mgr_reset;
2662         }
2663
2664         /*
2665          * sid = 0, did = 0
2666          * link down or device being removed
2667          */
2668         if (!fnic->in_remove)
2669                 fnic_scsi_cleanup(lp);
2670         else
2671                 fnic_scsi_abort_io(lp);
2672
2673         /* call libFC exch mgr reset to reset its exchanges */
2674 call_fc_exch_mgr_reset:
2675         fc_exch_mgr_reset(lp, sid, did);
2676
2677 }
2678
2679 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data,
2680                                    bool reserved)
2681 {
2682         struct fnic_pending_aborts_iter_data *iter_data = data;
2683         struct fnic *fnic = iter_data->fnic;
2684         int cmd_state;
2685         struct fnic_io_req *io_req;
2686         spinlock_t *io_lock;
2687         unsigned long flags;
2688
2689         /*
2690          * ignore this lun reset cmd or cmds that do not belong to
2691          * this lun
2692          */
2693         if (iter_data->lr_sc && sc == iter_data->lr_sc)
2694                 return true;
2695         if (iter_data->lun_dev && sc->device != iter_data->lun_dev)
2696                 return true;
2697
2698         io_lock = fnic_io_lock_hash(fnic, sc);
2699         spin_lock_irqsave(io_lock, flags);
2700
2701         io_req = (struct fnic_io_req *)CMD_SP(sc);
2702         if (!io_req) {
2703                 spin_unlock_irqrestore(io_lock, flags);
2704                 return true;
2705         }
2706
2707         /*
2708          * Found IO that is still pending with firmware and
2709          * belongs to the LUN that we are resetting
2710          */
2711         FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2712                       "Found IO in %s on lun\n",
2713                       fnic_ioreq_state_to_str(CMD_STATE(sc)));
2714         cmd_state = CMD_STATE(sc);
2715         spin_unlock_irqrestore(io_lock, flags);
2716         if (cmd_state == FNIC_IOREQ_ABTS_PENDING)
2717                 iter_data->ret = 1;
2718
2719         return iter_data->ret ? false : true;
2720 }
2721
2722 /*
2723  * fnic_is_abts_pending() is a helper function that
2724  * walks through tag map to check if there is any IOs pending,if there is one,
2725  * then it returns 1 (true), otherwise 0 (false)
2726  * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2727  * otherwise, it checks for all IOs.
2728  */
2729 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2730 {
2731         struct fnic_pending_aborts_iter_data iter_data = {
2732                 .fnic = fnic,
2733                 .lun_dev = NULL,
2734                 .ret = 0,
2735         };
2736
2737         if (lr_sc) {
2738                 iter_data.lun_dev = lr_sc->device;
2739                 iter_data.lr_sc = lr_sc;
2740         }
2741
2742         /* walk again to check, if IOs are still pending in fw */
2743         scsi_host_busy_iter(fnic->lport->host,
2744                             fnic_abts_pending_iter, &iter_data);
2745
2746         return iter_data.ret;
2747 }